Strobe 500 and Globe Strobe 500 1971 Singer Graflex division manual, 26 pages. Calls for a 450V battery but does not list any manifacture part number.
Strobomatic 500 1968 Graflex, Inc./a subsidiary of The Singer Company; manual 21 pages. Same as above HV uses 450V dry battery, no reference to a manifacture or part/model number.
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The top unit that came with the 'HV' base is just like my 'RG' and will power up and flash on the 'RG' base. The RG has three voltage outputs -5, -10, -10. Doubt that a 450v battery links into my system. I think my purchase was a marriage of the two. I'm going to take a shot at converting a computer switched power supply the provide the -10,-10,-5 VDC